Question

Which of the following is not one of the three major structures of coral reefs? a. planulae b. fringing c. barrier d. atoll

Answer 1

option a) planulae is not a reef

Answer 2

a. Planulae is not one of the three major structures of coral reefs.

There are different types of coral reefs based on the place where they are formed. There are four different structures of coral reefs which are as follows:

• Fringing reefs: They grow near coast lands of islands.
• Barrier reefs: They grow parallel to the coastline.
• Atoll coral reefs: These grow deep in the sea.
• Patch reef: These occur between fringing and barrier reefs.